Lets see how much I can cover in this first attempt
Many of these items are covered and discussed in individual threads so try the search
You'll possibly need
1- Trunk board to cover the gap between trunk floor and the quarter panel. This will be a stiff press paper product available through most Mustang parts sellers. Not sure if there is allot of differences out there. Some vendors in the past use to stick a label on the material and removing it could damage the finish so this might be a consideration for some
2- Spare tire board. Made of Masonite . Jack at DeadNutsOn sells a reproduction for 69 with gray sealer or you might be able to have him leave that off so you can use yellow like San Jose used IMHO
3- Underlayment . Either for just over your gas tank or stretched across the trunk floor if you have a Grande or Mach I. There is an article in the Library with how I made my own.
4- Trunk mat - Not sure how many reproducers there are or if there is just one all of the shops are selling. A San Jose one would have the same speakled top and burtex backing as the other two plants
5- Jack. Available only as a used item. to determine what you need (correct for your plant and year) check out the Jack article in the sites Library
6- Jack hold down - This Scott Fuller Reproduction link should help
http://www.scottfullerreproductions.com/catalog/item/4595229/6752241.htm7- Lug/jack wrench. Not available as a reproduction that I'm aware of
8- Felt spare tire liner or what ever the official name is. Haven't purchased one recently. In the past found some to not be stiff enough. Hopefully others that have had more recent experience with any of these items will offer their observations and help you out further. At least this is a start